The alternative is stock. Manufacturers aren't quite so stupid anymore. They pick the low-hanging fruit themselves. You'll need to spend big money to get much more out of these engines. Anything less and you get some shiny parts that may give you a small boost on a narrow section of powerband while sapping power on the other 95% of the powerband.

The alternative is stock. Manufacturers aren't quite so stupid anymore. They pick the low-hanging fruit themselves. You'll need to spend big money to get much more out of these engines. Anything less and you get some shiny parts that may give you a small boost on a narrow section of powerband while sapping power on the other 95% of the powerband.